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List:       xen-devel
Subject:    Re: [Xen-devel] Tapdisk2 problem
From:       Daniel Stodden <daniel.stodden () citrix ! com>
Date:       2010-08-15 20:36:54
Message-ID: 1281904614.2427.100.camel () ramone ! somacoma ! net
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On Sun, 2010-08-15 at 16:28 -0400, Keir Fraser wrote:
> On 15/08/2010 20:35, "Daniel Stodden" <daniel.stodden@citrix.com> wrote:
> 
> > The problem is that the kernel has those changes. What's going to happen
> > is that if tapdisk2 anticipates the ring 'message' at offset 17, not 16
> > as intended, it will fail to find/clear the ring message, while the
> > kernel will keep it spinning through select(), and that's what you're
> > seeing.
> > 
> > Keir, okay to just pull that stuff?
> 
> What stuff to where?

changeset:   21707:feee0abed6aa
user:        Keir Fraser <keir.fraser@citrix.com>
date:        Fri Jul 02 18:58:02 2010 +0100
summary:     blktap2: make protocol specific usage of shared sring
explicit

Into 4.0.1. The offsets were broken by

changeset:   20267:e9366bed077e
user:        Keir Fraser <keir.fraser@citrix.com>
date:        Thu Oct 01 12:27:01 2009 +0100
summary:     VNIF: Using smart polling instead of event notification.

Not so good?

Daniel



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